Intermittent crank but no start, intermittent warning lights on the dash. The customer states the fault is very intermittent (maybe twice a week).

An initial check showed no signs of fault. Parked car outside the workshop and started it every 10mins over a 1hour period, no faults.

Asked the customer to use the car normally for the rest of the day to replicate, no fault. The customer agreed to leave the vehicle with us for extended diagnosis / until the car faulted.